I've been using the BMW oil right from the dealership religiously since I got her, I believe the regular synthetic 5w30 stuff they sell for everything, doing oil changes at about 7000km intervals. Do you guys recommend a different oil? I know 99% of the V-Rod guys recommend Amsoil for their Harley's, so that's what I've always put in my bike. I've searched this and there's a ton of mixed information. With such high mileage, should I just stick to what I've been using, that being the BMW oil?